Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 30

1. TROUBLESHOOTING
Alarm No.: 28 Name: Linear encoder error 2
Alarm content
Detail
Detail name
No.
28.1 Linear encoder (1) The ambient
- Environment
error
(2) The signal level of the
Alarm No.: 2A Name: Linear encoder error 1
Alarm content
Detail
Detail name
No.
2A.1 Linear encoder (1)
error 1-1
(2) Something near the
(3) An alarm of the linear
2A.2 Linear encoder Check it with the check method for [AL. 2A.1].
error 1-2
2A.3 Linear encoder
error 1-3
2A.4 Linear encoder
error 1-4
2A.5 Linear encoder
error 1-5
2A.6 Linear encoder
error 1-6
2A.7 Linear encoder
error 1-7
2A.8 Linear encoder
error 1-8
Working environment of linear encoder is not normal.
Cause
Check the ambient
temperature of the temperature of the
linear encoder is out of linear encoder.
specifications.
Check the mounting
linear encoder has condition of the linear
dropped. encoder.
An error of the linear encoder was detected. (The details differ depending on the linear encoder
manufacturer.)
Cause
Mounting condition of Adjust the positions of
the linear encoder and the scale and head,
head is failure. and then check the
repeatability.
Check the noise,
device caused it. ambient temperature,
vibration, etc.
Check the content of
encoder was detected. the alarm detail list of
the "Linear Encoder
Instruction Manual".
Check method Check result
It is out of
specifications.
It is within
specifications.
It has a failure.
Check method Check result
It is not repeatable.
It is repeatable.
It has a failure.
It has no failure.
Remove its cause
described in the
instruction manual.
1 - 23
Action Target
Lower the [A]
temperature. Contact [B]
the linear encoder [WB]
manufacturer.
Check (2).
Correct the mounting
method of the linear
encoder.
Action Target
Use the equipment at [A]
the adjusted position. [B]
[WB]
Check (2).
Take
countermeasures
against its cause.
Check (3).
Contact each encoder
manufacturer for how
to deal with it.